IRON MOUNTAIN, MI -- Iron Mountain Police are investigating the impersonation of a police officer that took place over the weekend.

A woman was stopped by a man she believed to be a police officer at 11:10 p.m. Saturday at West D Street near Hemlock Street, Iron Mountain Police Lt. Ed Mattson told MLive.com and The Grand Rapids Press. She reported the incident the next day.

Mattson said the department is not releasing details of the exchange between the woman and man at this time.

The man was driving a black Chevrolet Impala with a push bumper, spotlight and red bubble light on top.

Police are currently looking for the vehicle and the incident is under investigation, Mattson said.